磁场强化全程自养脱氮工艺的启动

陈云帆; 钱萌萌; 康紫薇; 丁佳慧; 陈静; 贾文林

doi:10.13205/j.hjgc.202008024

磁场强化全程自养脱氮工艺的启动

doi: 10.13205/j.hjgc.202008024

江苏师范大学化学与材料科学学院, 江苏徐州 221116

基金项目:

国家自然科学基金项目（51708263）；江苏省大学生创新创业训练计划项目（201810320170X）；江苏省研究生科研与实践创新计划项目。

详细信息

作者简介:
陈云帆(1996-),女,硕士研究生,主要研究方向为厌氧氨氧化及CANON工艺的优化及应用。2020180412@jsnu.edu.cn

通讯作者:
贾文林(1986-),男,博士,副教授,主要研究方向为新型污水生物脱氮技术。jiawenlin@jsnu.edu.cn

计量
- 文章访问数: 159
- HTML全文浏览量: 12
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2019-05-05

START-UP OF A COMPLETELY AUTOTROPHIC NITROGEN REMOVAL OVER NITRITE PROCESS ENHANCED BY MAGNETIC FIELD

School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China

摘要

摘要: 为强化全程自养脱氮（CANON）工艺的脱氮性能，利用膜生物反应器（MBR）启动CANON工艺，并对其施加静态磁场进行强化，分析磁场作用下CANON工艺脱氮效果，并对其影响机理进行解析。结果表明：适宜强度的磁场强化了CANON工艺的脱氮效率，并缩短了工艺启动周期。磁场作用下，CANON工艺后期平均氮去除负荷为49.5 g/（m³·d），相比于对照提高了1.45倍。在低温条件下，磁场的存在能使CANON工艺保持较高的反应活性，其平均氮去除负荷为对照组的2.88倍。磁场促进了污泥胞外聚合物的合成与分泌，提高了蛋白的含量，同时降低了反应器内体系Zeta电位，有利于污泥的聚集，使其内部形成不同的氧分区，促进了CANON工艺中不同微生物的共存，从而强化了CANON工艺的脱氮效率。
- 磁场 /
- CANON工艺 /
- 氮去除负荷 /
- 胞外聚合物
Abstract: In order to enhance the nitrogen removal performance of completely autotrophic nitrogen removal over nitrite (CANON) process, membrane bioreactors (MBRs) were constructed to start the CANON process in this study. Static magnetic field (MF) was applied to enhance the CANON process, and the nitrogen removal performance and the mechanism were analyzed. The results showed that MF with suitable intensity enhanced the nitrogen removal rate (NRR) and shortened the start-up period during the CANON process. The average NRR during the late period reached 49.5 g/(m³·d) with the exposure to MF, which was 1.45 times higher than the control. At low temperature, the CANON process could keep high activity with the exposure to MF, and the average NRR was 2.88 times of the control. The MF could stimulate the synthesis and secretion of extracellular polymer (EPS) of sludge, and enhance the contents of protein in EPS. Meanwhile the zeta potential of the mixture in the reactor decreased due to the application of MF, which was conducive to the aggregation of the activated sludge. The oxygen concentration gradient in the flocs favored the coexistence of different microorganisms during CANON process, resulting in the enhancement of nitrogen removal.
- magnetic field /
- CANON process /
- nitrogen removal rate /
- EPS

HTML全文

参考文献(19)

LACKNER S, GILBERT E M, VLAEMINCK S E, et al. Full-scale partial nitritation/anammox experiences:an application survey[J]. Water Research, 2014, 55:292-303.

LIU T, LI D, ZHANG J, et al. Effect of temperature on functional bacterial abundance and community structure in CANON process[J]. Biochemical Engineering Journal, 2016, 105:306-313.

WANG Z Z, LIANG H, QU F S, et al. Start up of a gravity flow CANON-like MBR treating surface water under low temperature[J]. Chemical Engineering Journal, 2013, 217:466-474.

YUE X, YU G P, LU Y Q, et al. Effect of dissolved oxygen on nitrogen removal and the microbial community of the completely autotrophic nitrogen removal over nitrite process in a submerged aerated biological filter[J]. Bioresource Technology, 2018, 254:67-74.

黄京, 徐亚慧, 张亮, 等. CANON工艺快速启动和运行过程中anammox群落变化研究[J]. 环境工程, 2014, 32(12):36-41.

FILIPIC J, KRAIGHER B, TEPUS B, et al. Effect of low-density static magnetic field on the oxidation of ammonium by Nitrosomonas europaea and by activated sludge in municipal wastewater[J]. Food Technology and Biotechnology, 2015, 53(2):201-206.

周晓玮, 陆宇苗, 陈露, 等. 磁场对短程硝化工艺运行效果的影响[J]. 环境工程, 2017, 35(3):34-37

,42.

LIU S T, YANG F L, MENG F G, et al. Enhanced anammox consortium activity for nitrogen removal:impacts of static magnetic field[J]. Journal of Biotechnology, 2008, 138(3/4):96-102.

ZHANG X J, LI D, LIANG Y H, et al. Performance and microbial community of completely autotrophic nitrogen removal over nitrite (CANON) process in two membrane bioreactors (MBR) fed with different substrate levels[J]. Bioresource Technology, 2014, 152:185-191.

国家环境保护总局. 水和废水监测分析方法编委会. 水和废水监测分析方法[M]. 4版.北京:中国环境科学出版社, 2002.

CHEN Y N, WU Y X, WANG D B, et al. Understanding the mechanisms of how poly aluminium chloride inhibits short-chain fatty acids production from anaerobic fermentation of waste activated sludge[J]. Chemical Engineering Journal, 2018, 334:1351-1360.

DESMOND P, BEST J P, MORGENROTH E, et al. Linking composition of extracellular polymeric substances (EPS) to the physical structure and hydraulic resistance of membrane biofilms[J]. Water Research, 2018, 132:211-221.

SUI Q W, LIU C, ZHANG J Y, et al. Response of nitrite accumulation and microbial community to free ammonia and dissolved oxygen treatment of high ammonium wastewater[J]. Applied Microbiology and Biotechnology, 2016, 100(9):4177-4187.

NIU C, LIANG W H, REN H Q, et al. Enhancement of activated sludge activity by 10~50 mT static magnetic field intensity at low temperature[J]. Bioresource Technology, 2014, 159:48-54.

MORE T T, YADAV J S S, YAN S, et al. Extracellular polymeric substances of bacteria and their potential environmental applications[J]. Journal of Environmental Management, 2014, 144:1-25.

DING Z J, BOURVEN I, GUIBAUD G, et al. Role of extracellular polymeric substances (EPS) production in bioaggregation:application to wastewater treatment[J]. Applied Microbiology and Biotechnology, 2015, 99(23):9883-9905.

宋成康, 王亚宜, 韩海成, 等. 温度降低对厌氧氨氧化脱氮效能及污泥胞外聚合物的影响[J]. 中国环境科学, 2016, 36(7):2006-2013.

GEYIK A G, CECEN F. Variations in extracellular polymeric substances (EPS) during adaptation of activated sludges to new feeding conditions[J]. International Biodeterioration & Biodegradation, 2015, 105:137-145.

FLEMMING H C, WINGENDER J. The biofilm matrix[J]. Nature Reviews Microbiology, 2010, 8(9):623-633.

施引文献

资源附件(0)

访问统计